The thirteenth century, like the eighteenth century, was a siècle français. Even Frederick II had failed to eradicate the impression German decline which had found expression after Philip Augustus's victory at Bouvines in 1214. After Frederick II's death in 1250, the Capetian monarchy had used its power, its prestige and its traditions to obtain political predominance in Europe and, indeed, throughout the Mediterranean world. The French monarchy was not, indeed, so firmly established as contemporaries supposed: after 1314 a period of “feudal reaction” set in, which revealed the weaknesses in the political structure the Capetians had built up. But the sudden concentration of French power in the closing years of the thirteenth century, the unity of the country around the throne, and the unanimous support which all classes, nobility, clergy and bourgeoisie, gave to royal policy, not only contrasted markedly with the divergences of interest within England and within Germany, but also gave the Capetian monarchs decisive advantages in their dealings with other governments. French policy, based on Carolingian tradition and directed to the “reintegration” of Gaul, was, by comparison with the mere conservatism of Edward I, positive, clearly defined, and systematically pursued. Unlike English or German policy i t was invigorated by a conscious “ideology”, which found expression not only in the unofficial writings of Pierre Dubois, but also in the official memoranda of Nogaret, Flote and Plaisians, and which had deep roots in French history.3 Because of these advantages, France at this period was the focal point at which all the complex problems of European politics converged: all the wires which statesmen were pulling, passed through Paris. European policy responded or reacted to the policy of France.